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07.07.2019 •
Mathematics
Determine the image of the point (5, -2) under a rotation of 90 degrees about the origin. a.) (2, 5) b.) (-2, 5) c.) (-5, 2) d.) (-5, -2)
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Ответ:
90 degrees means 90 degrees counterclockwise. So from the fourth quadrant we'll end up in the first quadrant. X and Y get swapped and one negated, it must be the -2 becoming 2, so our image is
(2,5)
A
Ответ:
1/5
Step-by-step explanation:
Of the 5 spinner sections, 2 are less than 3.
P(less than 3) = 2/5
Of the 2 sides of the coin, 1 is tails.
P(tails) = 1/2
The compound probability is therefore:
P = 2/5 × 1/2
P = 1/5